The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1992
Filed:
May. 18, 1989
Keiji Kanota, Kanagawa, JP;
Michio Nagai, Saitama, JP;
Sony Corporation, Tokyo, JP;
Abstract
An apparatus for processing an input data signal has a generator providing a plurality of pseudo-random signals each of which scrambles the input data signal for providing a plurality of respective scrambled outputs, a detector by which a DC component, such as, a run-length or a digital sum value, is detected for each of the scrambled outputs, and a selector responsive to the detector for selecting one of the scrambled outputs, for example, having a minimum run-length or a digital sum value closest to zero. An identifying signal identifying the pseudo-random signal used in scrambling the selected scrambled output is then transmitted with the latter, for example, by recording on a magnetic tape. When the transmitted signal is received or reproduced, the identifying signal included with it is detected, and the received signal is descrambled with a pseudo-random signal corresponding to the detected identifying signal.